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(Mole-Mole problems) (Mole-Mole problems) (Mole-Mole problems) (Mole-Mole problems)

(Mole-Mole problems) (Mole-Mole problems) - PowerPoint Presentation

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(Mole-Mole problems) (Mole-Mole problems) - PPT Presentation

Use the coefficients to predict the amount of reactant consumed or product formed The ratio of the coefficients is a ratio of the moles taking part in a reaction Reactants on the left of the arrow are consumed ID: 791287

mole moles 2003 deutsch moles mole deutsch 2003 question react coefficients regents number reaction kclo3 completely substance formed kcl

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Slide1

(Mole-Mole problems)

Slide2

(Mole-Mole problems)

Use the coefficients to predict the amount of reactant consumed or product formed

The ratio of the coefficients is a ratio of the moles taking part in a reaction.Reactants (on the left of the arrow) are consumedProducts (on the right of the arrow) are formedGiven the number of moles of any substance in a reaction, you can use the coefficients to find the number of moles of any other substance.

J Deutsch 2003

2

Slide3

Place the moles given over the coefficient for that substance and set up a proportion with the coefficients.

How many moles of oxygen are produced when 4 moles of KClO3 react according to the equation:

2 KClO3 2 KCl + 3 O2 4

X 2 KClO3 2 KCl + 3 O24 = X 2 3 cross multiply to get 2X = 12X=6 moles

J Deutsch

203

3

given

unknown

Slide4

Slide5

J Deutsch 2003

5

Regents Question: 06/03 #20

Given the reaction:

PbCl

2

(

aq

) + Na

2CrO4 (aq) PbCrO4 (s) + 2NaCl(aq)What is the total number of moles of

NaCl formed when 2 moles of Na2CrO4 react completely?(1) 1 mole(2) 2 moles (3) 3 moles(4) 4 molesþ

Slide6

J Deutsch 2003

6

Regents Question: 06/03 #20

Given the reaction:

PbCl

2

(

aq

) + Na

2CrO4 (aq) PbCrO4 (s) + 2NaCl(aq)What is the total number of moles of

NaCl formed when 2 moles of Na2CrO4 react completely?(1) 1 mole(2) 2 moles (3) 3 moles(4) 4 molesþ

Slide7

J Deutsch 2003

7

Regents Question: 06/02 #34

A compound has a gram formula mass of 56 grams per mole. What is the molecular formula for this compound?

CH

2

C

2

H

4C3H6C4H8

þ

Slide8

J Deutsch 2003

8

Regents Question: 01/03 #42

Given the equation:

2C

2

H

2

(g) + 5O

2(g) 4 CO2(g) + 2H2O(g)How many moles of oxygen are required to react completely with 1.0 mole of C2H2?2.52.05.010

þ